I like the idea presented as I enjoy helping free company members, linkshell members, random people shouting on various tasks. Likewise it seems more purposeful to do that than the alternative which we are seeing.
Mario the beast men have gathered even more crystals you must kill the primals which you already killed... again.
Or the hard mode version of dungeons...
Mario you killed the giants trying to escape the mines, but now their cousins, who didn't help them trying to escape after a 100 years of imprisonment have decided they want to see this whole blue sky thing. They were deeper in the mind so they are much stronger now!
In short; it would give them time to create new content then slap hard mode an what I consider a poorly written storyline to recycle the same thing.